On the 26th, upon learning of the cattle supply train escorted by a Mexican cavalry force, the Texans decided to attack it, believing that it was in fact carrying pay for the Mexican soldiers. A Texan cavalry force was ordered to attack the Mexican cavalry while 100 Texan soldiers were sent to attack the supply train. Despite the Mexican's best efforts, the Texans forced them to retreat back to the town. The number of casualties is not entirely clear. Two of the Texan military officers stated that either 15 or 60 Mexican soldiers were killed (and several wounded), while historian Alwyn Barr states that only three Mexican soldiers died and four Texans were wounded.